Chain guard



FIG. 1 is a front elevation view of a first embodiment of a chain guard embodying our new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof; and

FIG. 7 is a top and front perspective view thereof.

FIG. 8 is a front elevation view of a second embodiment of a chain guard embodying our new design;

FIG. 9 is a rear elevation view thereof;

FIG. 10 is a top plan view thereof;

FIG. 11 is a bottom plan view thereof;

FIG. 12 is a right side elevation view thereof;

FIG. 13 is a left side elevation view thereof; and,

FIG. 14 is a top and front perspective view thereof. 

CLAIM The ornamental design for a chain guard, as shown and described. 